package com.example.community.controller;

import com.alibaba.fastjson.JSONObject;
import com.example.community.entity.Message;
import com.example.community.entity.Page;
import com.example.community.entity.User;
import com.example.community.service.MessageService;
import com.example.community.service.UserService;
import com.example.community.util.CommunityConstant;
import com.example.community.util.CommunityUitl;
import com.example.community.util.HostHolder;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.util.HtmlUtils;

import java.util.*;

@Controller
public class MessageController implements CommunityConstant {

    @Autowired
    private MessageService messageService;
    @Autowired
    private HostHolder hostHolder;
    @Autowired
    private UserService userService;


    // 私信列表
    @RequestMapping(path = "/letter/list", method = RequestMethod.GET)
    public String getLetterList(Model model, Page page) {
        User user = hostHolder.getUser();
        // 分页信息
        page.setLimit(5);
        page.setPath("/letter/list");
        page.setRows(messageService.findConversationCount(user.getId()));

        // 会话列表
        List<Message> conversationList = messageService.findConversations
                (user.getId(), page.getOffset(), page.getLimit());

        // 保存每条会话的具体内容
        List<Map<String, Object>> conversations = new ArrayList<>();
        if (conversationList != null) {
            for (Message message : conversationList) {
                Map<String, Object> map = new HashMap<>();
                // 会话信息
                map.put("conversation", message);
                // 私信的总数
                map.put("letterCount", messageService.findLetterCount(message.getConversationId()));
                // 未读的私信数
                map.put("unreadCount", messageService.findLetterUnreadCount(user.getId(), message.getConversationId()));
                // 发送私信的用户
                int targetId = user.getId().equals(message.getFromId()) ? message.getToId() : message.getFromId();
                map.put("target", userService.findUserById(targetId));

                conversations.add(map);
            }
        }
        model.addAttribute("conversations", conversations);

        // 查询未读私信数量
        int letterUnreadCount = messageService.findLetterUnreadCount(user.getId(), null);
        model.addAttribute("letterUnreadCount", letterUnreadCount);
        // 查询未读通知数量
        int noticeUnreadCount = messageService.findNoticeUnreadCount(user.getId(), null);
        model.addAttribute("noticeUnreadCount", noticeUnreadCount);

        return "site/letter";
    }

    // 私信详情
    @RequestMapping(path = "/letter/detail/{conversationId}", method = RequestMethod.GET)
    public String getLetterDetail(@PathVariable("conversationId") String conversationId, Page page, Model model) {
        // 分页消息
        page.setLimit(5);
        page.setPath("/letter/detail/" + conversationId);
        page.setRows(messageService.findLetterCount(conversationId));

        // 私信列表
        List<Message> letterList = messageService.findLetters(conversationId, page.getOffset(), page.getLimit());
        List<Map<String, Object>> letters = new ArrayList<>();
        if (letterList != null) {
            for (Message message : letterList) {
                Map<String, Object> map = new HashMap<>();
                map.put("letter", message);
                map.put("fromUser", userService.findUserById(message.getFromId()));

                letters.add(map);
            }
        }
        model.addAttribute("letters", letters);

        // 私信目标
        model.addAttribute("target", gerLetterTarget(conversationId));

        //设置已读
        List<Integer> ids = getLetterId(letterList);
        if (!ids.isEmpty()) {
            messageService.readMessage(ids);
        }

        return "site/letter-detail";
    }

    // 获取私信的发送者
    private User gerLetterTarget(String conversationId) {
        String[] ids = conversationId.split("_");
        int id0 = Integer.parseInt(ids[0]);
        int id1 = Integer.parseInt(ids[1]);

        if (hostHolder.getUser().getId() == id0) {
            return userService.findUserById(id1);
        }
        return userService.findUserById(id0);
    }

    // 获取私信的id，用来设置已读
    private List<Integer> getLetterId(List<Message> letterList) {
        List<Integer> ids = new ArrayList<>();
        if (letterList != null) {
            for (Message message : letterList) {
                if (hostHolder.getUser().getId().equals(message.getToId()) && message.getStatus() == 0) {
                    ids.add(message.getId());
                }
            }
        }
        return ids;
    }

    // 发送私信
    @RequestMapping(path = "/letter/send", method = RequestMethod.POST)
    @ResponseBody
    public String sendLetter(String toName, String content) {
        User target = userService.findUserByName(toName);
        if (target == null) {
            return CommunityUitl.getJSONString(1, "目标用户不存在！");
        }
        Message message = new Message();
        message.setFromId(hostHolder.getUser().getId());
        message.setToId(target.getId());
        if (message.getFromId() < message.getToId()) {
            message.setConversationId(message.getFromId() + "_" + message.getToId());
        } else {
            message.setConversationId(message.getToId() + "_" + message.getFromId());
        }
        message.setContent(content);
        message.setStatus(0);
        message.setCreateTime(new Date());
        messageService.addMessage(message);

        return CommunityUitl.getJSONString(0);
    }

    // 获取各种通知消息
    @RequestMapping(path = "/notice/list", method = RequestMethod.GET)
    public String getNoticeList(Model model) {
        // 当前用户
        User user = hostHolder.getUser();

        // 查询评论类通知
        Message message = messageService.findLatestNotice(user.getId(), TOPIC_COMMENT);
        Map<String, Object> messageVo = new HashMap<>();
        // 加入通知
        messageVo.put("message", message);  // 如果message为空，则没有通知，不显示
        if (message != null) {

            // 私信内容
            String content = HtmlUtils.htmlUnescape(message.getContent()); // 把转移字符去掉
            Map<String, Object> data = JSONObject.parseObject(content, HashMap.class);

            messageVo.put("user", userService.findUserById((Integer) data.get("userId")));
            messageVo.put("entityType", data.get("entityType"));
            messageVo.put("entityId", data.get("entityId"));
            messageVo.put("postId", data.get("postId"));

            // 通知数量
            int count = messageService.findNoticeCount(user.getId(), TOPIC_COMMENT);
            messageVo.put("count", count);
            // 未读通知数量
            int unread = messageService.findNoticeUnreadCount(user.getId(), TOPIC_COMMENT);
            messageVo.put("unread", unread);
        }
        model.addAttribute("commentNotice", messageVo);

        // 查询点赞类通知
        message = messageService.findLatestNotice(user.getId(), TOPIC_LIKE);
        messageVo = new HashMap<>();
        messageVo.put("message", message); // 如果message为空，则没有通知，不显示
        if (message != null) {
            // 私信内容
            String content = HtmlUtils.htmlUnescape(message.getContent()); // 把转移字符去掉
            Map<String, Object> data = JSONObject.parseObject(content, HashMap.class);

            messageVo.put("user", userService.findUserById((Integer) data.get("userId")));
            messageVo.put("entityType", data.get("entityType"));
            messageVo.put("entityId", data.get("entityId"));
            messageVo.put("postId", data.get("postId"));

            // 通知数量
            int count = messageService.findNoticeCount(user.getId(), TOPIC_LIKE);
            messageVo.put("count", count);
            // 未读通知数量
            int unread = messageService.findNoticeUnreadCount(user.getId(), TOPIC_LIKE);
            messageVo.put("unread", unread);
        }
        model.addAttribute("likeNotice", messageVo);

        // 查询关注类通知
        message = messageService.findLatestNotice(user.getId(), TOPIC_FOLLOW);
        messageVo = new HashMap<>();
        messageVo.put("message", message);  // 如果message为空，则没有通知，不显示
        if (message != null) {

            // 私信内容
            String content = HtmlUtils.htmlUnescape(message.getContent()); // 把转移字符去掉
            Map<String, Object> data = JSONObject.parseObject(content, HashMap.class);

            messageVo.put("user", userService.findUserById((Integer) data.get("userId")));
            messageVo.put("entityType", data.get("entityType"));
            messageVo.put("entityId", data.get("entityId"));

            // 通知数量
            int count = messageService.findNoticeCount(user.getId(), TOPIC_FOLLOW);
            messageVo.put("count", count);
            // 未读通知数量
            int unread = messageService.findNoticeUnreadCount(user.getId(), TOPIC_FOLLOW);
            messageVo.put("unread", unread);
        }
        model.addAttribute("followNotice", messageVo);

        // 查询未读私信数量
        int letterUnreadCount = messageService.findLetterUnreadCount(user.getId(), null);
        model.addAttribute("letterUnreadCount", letterUnreadCount);

        // 查询未读的系统通知数量
        int noticeUnreadCount = messageService.findNoticeUnreadCount(user.getId(), null);
        model.addAttribute("noticeUnreadCount", noticeUnreadCount);

        return "site/notice";
    }

    // 通知详情
    @RequestMapping(path = "/notice/detail/{topic}", method = RequestMethod.GET)
    public String getNoticeDetail(@PathVariable("topic") String topic, Page page, Model model) {
        User user = hostHolder.getUser();
        page.setLimit(5);
        page.setPath("/notice/detail/" + topic);
        page.setRows(messageService.findNoticeCount(user.getId(), topic));

        List<Message> noticeList = messageService.findNotices(user.getId(), topic, page.getOffset(), page.getLimit());
        List<Map<String, Object>> noticeVoList = new ArrayList<>();
        if (noticeList != null) {
            for (Message notice : noticeList) {
                Map<String, Object> map = new HashMap<>();
                // 通知
                map.put("notice", notice);
                // 内容
                String content = HtmlUtils.htmlUnescape(notice.getContent()); // 去掉转移字符
                Map<String, Object> data = JSONObject.parseObject(content, HashMap.class);
                map.put("user", userService.findUserById((Integer) data.get("userId")));
                map.put("entityType", data.get("entityType"));  // 被通知的实体类型/因为什么被通知(关注，点赞，回复）
                map.put("entityId", data.get("entityId"));  // 实体id
                map.put("postId", data.get("postId"));
                // 通知作者
                map.put("fromUser", userService.findUserById(notice.getFromId()));
                // 将每一天通知，加入到数组中
                noticeVoList.add(map);
            }

        }
        model.addAttribute("notices", noticeVoList);

        // 设置已读
        List<Integer> ids = getLetterId(noticeList);
        if(!ids.isEmpty()){
            messageService.readMessage(ids);
        }

        return "site/notice-detail";

    }

}


